Edit timeframe list (hide 3 4 6 7 8 9), and why to add special 12m (MT5) timeframe for 15min traders

The timeframe list has become too cluttered, too long.
It seems like many have just been added at random, like 3 4 6 7 8 9 min...
1min and 5min are required. but many consider 1min too noisy.
2min is a good option to replace the 1m. But 3, 4, 6, 7, 8, 9??? This looks like a typical decision by "programmers not traders".

Do you watch or trade the 15min charts? There is a timeframe available in MT5 that cTrader does not have, and it has some advantages, the 15min, and that is the 12min.

Why 12min. do you ask? Many consider 10min too short/different from 15, but they want to take out some of the lag from their 15min oscillators/indicators.

12min is 20% faster than 15, and 20% slower than 10. So it is right in the middle, a great compromise - longer than 10 but slightly quicker than 15. It is like an improved 15.

Your charts will look just like the 15, but you get your 15min signal and patters just a little bit sooner than others will see it.